Brush-holder.



PATENTED DEC. 6, 1904.

E. D.- PRIEST.

BRUSH HOLDER.

APPLICATION FILED APR.19, 1902.

no MODEL.

(*J l 'nessesz lhvenCor.

Edward D Fries? MQZLW No. 776,546. Patented December 6, 1904.

UNITED STATES PATENT OFFICE.

EDWVARD D. PRIEST, OF SOHENEOTADY, NEIV YORK, ASSIGNOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEIV YORK.

BRUSH-HOLDER.

SPECIFICATION forming part of Letters Patent No. 776,546, dated December 6, 1904.

Application filed April 19, 1902. Serial No. 103,683. (No model.)

who?" it y a laminated covering 14:, of copper, in contact 5 Be it known that I, EDWARD D. PRIEST, a with the follower and with a segmental circucitizen of the United States, residing at Schenlar copper tip 15, which is secured to the end ectady, in the county of Schenectady, State of of the pressure-spring and rests on the outer New York, have invented certain new and useend of the brush.

ful Improvements in Brush-Holders, of which Current is conveyed to the brush-holder by the following is a specification. a lead 16. A flexible conductor 17 connects This invention relates to dynamo-electric each follower with the holder, and the lamimachines, and especially induction-motors for nated covering 14 on the pressure-spring aselectric railways; and its object is to provide sists in carrying the current to the brush.

an improved brush holder whereby two This construction makes a simple compact 0o brushes arranged in tandem may be pressed brush-holder of large current-carrying capacagainst the collector-ring by a single spring. ity and readily assembled and repaired.

In the accompanying drawings, Figure 1 is WVhat I claim as new, and desire to secure a sectional elevation of a brush-holder emby Letters Patent of the United States, is

bodying my invention. Fig. 2 is a top plan 1. A brush-holder having sockets for two 65 view of a portion of the same. Fig. 3 is a brushes, a separate follower for each brush, cross-section on the line 3 3, Fig. 2; and Fig. and a single spring acting on both followers. 4 is a detail. 2. A brush-holderhavingtwobrush-sockets The holder-body 1 is suitably supported adin tandem, a separate follower for each brush,

' jacent to the collector-ring 2, as by means of and a single spring acting on both followers. 70

an insulated stud 3, projecting from a support 3. The combination with a brush holder 4, secured to the frame 5 of the machine. The body having two brush-sockets in tandem, of holder has two sockets 6 for the carbon two followers pivoted between said sockets,

-2 5 brushes 7, which stand radially to the 001- and a single spring actuating both followers.

lector-ring and are pressed against it by 4. The combination with a brush-holder 75 means of levers or followers 8, hinged on a body having two brush-sockets in tandem, of common pivot-pin 9, supported in the holder. a transverse pivot-pin between said sockets, To give a long bearing to each follower withtwo followers both hinged on said pin, and a in a limited space, the hub 10 of one may be single spring surrounding said pin and abutsleeved on that of the other, as shown in Fig. ting against both followers. 80 9 u. Surrounding said hubs ]S a helical spIIng o. lhe comblnation with a brusn holder 11, the ends of which are respectively enbody having two brush-sockets in tandem, of gaged with the two followers, so that each a transverse pivot-pin between said sockets,

3 5 follower serves as an abutment for the other, two followers hinged on said pin, the hub of and both are pressed against their brushes one being sleeved on that of the other, and a 8 5 with an equal force. In order to give the single helical spring surrounding said hubs followers enough play, they are offset where and having its ends engaged with said folthey join their hubs, as appears most clearly lowers.

in Fig. 2, leaving an open space between their 6. Inabrush-holder, apressure-springcomopposite edges. In order to increase the posed of a strip of phosphor-bronze having a 9 range of movement, these edges may be oblaminated copper covering. lique to the line of movement, but parallel In witness whereof I have hereunto set my with each other, as shown. Each follower hand this 17th day of April, 1902.

has a hook 12 to serve as a finger-hold for con- EDVARD D. PRIEST- venience in raising it to release the brush when desired. Each follower carries a pressurc- Witnesses: spring, which Is a strip of phosphor-bronze BENJAMIN B. HULL, 13, secured to the follower and provided with HELEN ORFORD. 

